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Town officials reject Bliss Corner cleanup responsibility Dartmouth, Massachusetts

By kk42|October 6th, 2021|Fall River, Lynn, Quincy, Geotechnical Massachusetts, Boston, Worcester, Springfield, Lowell, Cambridge, Brockton, New Bedford|

Source: Town officials reject Bliss Corner cleanup responsibility | Dartmouth 20 Kraseman St., where the PCBs were originally found. Photo by: Douglas McCulloch Dartmouth, Massachusetts officials told federal and state environmental agencies last week that the town should not be responsible for the cost of cleaning up PCBs and other toxic chemicals found in a Bliss Corner neighborhood. Meanwhile Bliss Corner residents are expressing frustration with their fortunes being left in limbo as the federal Environmental Protection Agency studies how to deal with an unknown amount of unknown hazards dumped in the area decades ago by as-of-now unidentified people or companies. Officials “categorically reject” claims by the Environmental Protection Agency that the town is responsible for transporting and locating the contaminants in the area, according to a letter written to the agency Sept. 28 by attorney Roy P. Giarrusso on behalf of the town. The EPA recently identified dangerously high levels of contaminants in five properties in the Bliss Corner neighborhood, which sparked the call for clean-up. The exact location of parcels being referenced and the source of information citing the town’s responsibility for transporting and locating the material to the area have not been identified, the letter reads. The letter was sent by the law firm of Giarrusso Norton Cooley and McGlone, a Quincy-based firm serving as counsel to the town on this issue. “The town categorically rejects EPA’s suggestion that the town is somehow an arranger or (even more perplexing) a transporter of hazardous substances to unspecified properties in the Bliss Corner Neighborhood,” according to the letter. “The Town is still left guessing where, exactly, EPA plans to conduct the work,” it read. “For that reason alone, the notice fails as a matter of law.” This past April, the state’s Department of Environmental Protection issued “Notice of Responsibility” letters to Dartmouth [...]

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Kirkwood Lake, other Superfund waterways finally to get cleanup

By kk42|October 4th, 2021|Newark, Jersey City, Paterson, Elizabeth, Edison, Woodbridge, Dover, Hamilton, Trenton, Camden, Geotechnical New Jersey|

Source: Kirkwood Lake, other Superfund waterways finally to get cleanup The federal government finally has decided to clean up Kirkwood Lake and other waterways connected with the Sherwin-Williams/Lucas Paintworks Superfund Site in Camden County. The Environmental Protection Agency said Friday that the next phase of the extensive Superfund site cleanup would be dredging of three contaminated lakes and one creek that span three communities — Gibbsboro, Voorhees and Lindenwold. "Hallelujah!" was the reaction of activist Alice Johnston, head of the Kirkwood Lake Environmental Committee. The committee has clamored for years for the cleanup of Kirkwood lake, as have residents and officials from Camden County, Gibbsboro and Voorhees in New Jersey. The lake borders on Voorhees and Lindenwold and is downstream from the former paint plant site in neighboring Gibbsboro. The other contaminated waterways due for cleanup are Silver Lake, Bridgewood Lake and Hilliard's Creek. "It has been a long haul. The Superfund site dates to 1980 when it was discovered and documented, but the first testing was not done until 1999," Johnston recalled. Besides contamination, Kirkwood Lake has become very shallow and is prone to vegetation growth that the county has tried to manage through herbicide spraying. “This final decision addresses the communities’ expressed desire that we clean up contamination in these waterbodies," said acting EPA Regional Administrator Walter Mugdan. He said the cleanup also will protect people "from exposure to arsenic and lead contamination in the soil and sediment while preserving valued community wetlands." An elated Camden County Director Jeffrey Nash called the EPA decision "a goal we all have been working toward for years." He credited persistence by local residents and especially by Gibbsboro Mayor Ed Campbell, who has been pushing for clean-up of multiple sites for several decades. Past cleanup phases have focused on the Route 561 Dump Site and the United States Avenue Burn [...]

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Landslide Prevention Near Sussex

By kk42|October 1st, 2021|Geotechnical California, Geotechnical Colorado, Geotechnical Nevada, Geotechnical Oregon, Geotechnical Utah, Geotechnical Washington|

Source: 'An engineering feat': Why this key section of railway is closed | ITV News Meridian Network Rail describes it as engineering feat, a two week project to stabilize three sections of Victorian railway embankment between Brighton and Hove. Until Saturday October 2nd 120 workers each day are working from up to 15 meters high to install rock bolts, soil nails and netting. All three interventions are designed to protect debris falling onto the tracks. In recent years landslides have led to significant delays for passengers on the network and climate change has made the chalk cutting incredibly vulnerable. Project manager, Tom McNamee says, "We've seen previously catastrophic failures of the embankment and that’s an unplanned failure, we have loose material fall onto the railway and that becomes a danger to trains and essentially we have to close the line in an unplanned, unexpected manor. "We really would like to thank our lineside neighbors, it is a massive inconvenience, we are using chainsaws and rock drills, loud and noisy equipment, right at the. Back of their properties for 14 days but we’re working closely with them and taking in all their concerns and considerations. If we were unable to do this work over 14 days we would have to do this over 12 weeks of night work and that would obviously have a bigger impact on the lives of people living here." 1,012 rock bolts being installed 1,000 soil nails being drilled in £5 million spent on the project Traveling between Brighton and Hove? This is what you need to know Trains between Brighton and London are unaffected No trains will run directly between Brighton and Hove/stations towards Littlehampton Trains will run to an amended timetable between Preston Park and Littlehampton and between Littlehampton and Portsmouth Harbour/Southampton Central Southern passengers will [...]

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Going Deep to Anchor Pump Stations

By kk42|October 1st, 2021|Geotechnical Georgia, Geotechnical Nebraska, Geotechnical Arkansas, Geotechnical California, Geotechnical Idaho|

Source: Going Deep to Anchor Pump Stations | WaterWorld Prime contractor Lakeshore Engineering used a crane with rigging to lower the Beretta T46 Drilling Rig into the excavation as UMA’s team provided direction. You need to build a stable foundation for improvements to a pump station but you’re located in a five-foot water table within proximity to a creek. How do you keep the foundation from rising? Georgia isn't the only place that struggles with a high water table. California, Arkansas, Texas, Nebraska, and Idaho all have large amount of groundwater. One Georgia county’s engineer chose to pin it down with rock anchors with the help of UMA Geotechnical Construction. Cherokee County Water and Sewerage Authority outsourced this pump station improvement project to Atlanta-based Lakeshore Engineering, a heavy civil contractor that focuses on industrial, municipal, and environmental projects. UMA served as the geotechnical subcontractor. Located within proximity to Blankets Creek in Canton, Georgia, the water table is known to fluctuate. UMA’s sole function was to install a rock anchor system to keep the pump station’s concrete slab pinned down. The components to be built on top of the slab would be a diesel engine-driven centrifugal pump and a concrete cast-in-place emergency storage tank. “The rock anchors are there for when the structure is empty,” explains UMA’s senior engineer and estimating manager Mitch Crayton. “When it’s empty and the groundwater table is above the bottom of the structure, if the rock anchors aren't there, it could push up out of the ground like a boat. These buoyant forces are exactly what the rock anchors are there to resist.” Working Down in the Hole One of the biggest challenges for UMA’s team was working in an excavation that was 23 feet deep and 56 feet wide. Lakeshore Engineering had excavated [...]

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Microbial material modification helps to control frost heave and saline soil solidification

By kk42|September 30th, 2021|Geotechnical Indiana, Environmental Indiana, Geotechnical Illinois, Geotechnical Michigan, Geotechnical Missouri, Geotechnical Minnesota, Geotechnical Iowa, Geotechnical Kansas, Geotechnical Nebraska|

Source: Microbial material modification helps to control frost heave and saline soil solidification Chinese researchers recently conducted a study on process of biogas generation improving physical and mechanical properties of soil. A research team led by Sheng Yu from the Northwest Institute of Eco-Environmental Resources (NIEER) of the Chinese Academy of Sciences (CAS), together with their colleagues from Southeast University, has implanted Pseudomonas Stutzeri in the soil pores and induced it to produce nitrogen bubbles, and they also analyzed the influence mechanism of mitigation of sand liquefaction using biogas bubbles. In the natural environment, there are many microorganisms in rock and soil masses, and its metabolic activities will change physical and mechanical properties of rock and soil. These microbial activities can be controlled, enhanced and used to solve geotechnical problems, and such methods have been named as biogeotechnologies. As an emerging interdisciplinary field, it has developed rapidly in recent years due to its advantages of low carbon and friendly environment. From the perspective of practical application, biogeotechnologies can be used for rock and soil reinforcement, sealing of water leakage, prevention of sand liquefaction, soil erosion resistance control, and contaminated soil treatment and so on. Based on the above research results, the NIEER research group is exploring to apply biogeotechnologies to frost heave control and saline soil solidification, and has achieved some preliminary results. In this study, the researchers applied biogas generation process to soil frost heaving treatment, and studied improvement of biogas production performance under low temperature conditions. Results showed that sealing effect of bubbles and microorganisms on the water migration path can reduce soil permeability coefficient by one order of magnitude. Besides, they also introduced biomineralization to solve the prominent problem of saline soil with high chloride content in Northwestern China. Based on excellent curing effect, they analyzed the deterioration mechanism of [...]

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Researchers in Tasmania design special drill for million year old ice core project

By kk42|September 29th, 2021|Geotechnical Colorado, Geotechnical Idaho, Geotechnical Montana, Geotechnical Utah, Geotechnical Alaska|

Source: Researchers in Tasmania design special drill for million-year old ice core project to help find answers to climate crisis | The Singleton Argus | Singleton, NSW Answers to the world's climate crisis may be discovered in a 2.8 kilometer pole of million-year-old ice that is set to be extracted from Antarctica and delivered back to research labs in Tasmania for atmospheric testing. Australian Antarctic Division researchers in Tasmania have designed and manufactured a 400-kilogram drill for the million year old ice core project which is capable of operating in minus 55 degree temperatures. It will bore down into 2.8 kilometers of ice, which is believed to be up to 1.5 million years old, to extract three meter sections of ice, or ice core, at any one time. Up to 8 tons of ice will then be brought back to research labs for AAD researchers to extract data and information about past temperatures, sea ice levels and wind patterns in Antarctica. Australian Antarctic Division engineers spent two months preparing blocks of ice that would replicate Antarctic ice, which were then used to test the specially designed drill. Picture: Australian Antarctic Division It will also be used to answer a "long standing mystery" in Antarctic research about the frequency of ice ages. The project is part of this year's Antarctic research season which has been dubbed the most ambitious season that the AAD have ever undertaken, with 500 scientists and up to 800 tons of cargo to be shipped to Antarctica. Australian Antarctic Division chief scientist Nicole Webster said the million year ice core project is an incredible milestone for climate research. She said layers in the ice core are like "pages in a diary", where tiny air bubbles trapped in the ice core contain atmosphere and other [...]

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Europe on course for healthier, more sustainable soil

By kk42|September 29th, 2021|Geotechnical Nebraska, Geotechnical California, Geotechnical New Mexico, Geotechnical New York, Geotechnical Vermont|

Source: On course for healthier, more sustainable soil On course for healthier, more sustainable soil Soil is home to about a quarter of all living species. Credit: Amadeu Biasco, Shutterstock If we want to transition to a greener, healthier and more climate resilient Europe, it is important to ensure our soils are in good condition. However, the quality of soils is worsening because of unsustainable management practices, depletion of resources, climate change and pollution. Soil hosts a quarter of our planet's biodiversity and is home to about a quarter of all living species. But how many of us give this precious resource a second thought? We should, because soil directly or indirectly produces about 95% of our food. Soil is important in so many other ways, too. It provides us with raw materials to fight diseases and ecosystem services that purify our drinking water, lower the risk of floods and droughts, and store huge amounts of carbon to alleviate climate change. Storehouse of life Soil biodiversity is the life that exists within the soil, from bacteria to earthworms. These living organisms keep soil healthy and fertile. Soil biodiversity is key to meeting European Green Deal objectives such as climate neutrality, biodiversity restoration, zero pollution, healthy and sustainable food systems, and a resilient environment. The EU wants to lead the transition towards healthy soils for food, people, nature and the climate by 2030. One problem is that about 970 million tons of soil is lost to erosion each year in Europe. If this underground treasure is so important to us, then why are we allowing it to be destroyed? To repair or reverse the damage to soil's rich yet fragile habitat takes decades—even centuries. We need to preserve the quality of soil before it is too late. Soil health is a major concern for the commission. It [...]

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Gaming to improve geotechnical engineering education—and broaden diversity

By kk42|September 28th, 2021|Geotechnical Delaware, Geotechnical New Jersey, Geotechnical Virginia, Geotechnical Maryland, Geotechnical Pennsylvania, Geotechnical West Virginia|

Source: Gaming to improve geotechnical engineering education—and broaden diversity | Rowan Today | Rowan University A new research project at Rowan University’s Center for Research and Education in Advanced Transportation Engineering Systems (CREATES) aims to teach students real-world geotechnical engineering concepts and attract diverse candidates to the field using interactive video games. Called MERGE (Multiphysics Enriched Mixed Reality for Integrated Geotechnical Education), the project is led by Dr. Cheng Zhu, an assistant professor in the Department of Civil and Environmental Engineering; Dr. Ying (Gina) Tang, an expert in serious games and professor in the Department of Electrical and Computer Engineering; Dr. Sarah Ferguson, an assistant professor in the College of Education; Dr. Sarah Bauer, an assistant professor in the Department of Civil and Environmental Engineering; as well as collaborator Dr. Lei Wang, assistant professor of geotechnical engineering at the University of the District of Columbia, a historically Black college and university. Both universities are located on the East Coast of the United States near Delaware, New Jersey, Pennsylvania, Virginia, Maryland, and West Virginia. The study is supported by a $299,210 grant from the National Science Foundation. While college civil engineering programs nationwide focus on concepts like soil mechanics and geotechnical engineering, some course content and textbooks don’t reflect emerging technology and research methods. MERGE games will include real-world scenarios students are likely to encounter in internships and careers in the geotechnical engineering field. Because the games are computer-based, students don’t need access to a lab or expensive equipment, making the learning scenarios accessible anytime and anywhere. It is expected that such authentic, fun and engaging play in games will promote learning. “Most universities don’t really use games to teach students, especially in our field,” Zhu said. “When we design these games, we want to make it very different from the current efforts.” The [...]

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UNF first in Florida to conduct large-scale lab testing on sinkholes

By kk42|September 24th, 2021|Cone Penetration, Geotechnical South Carolina, Sinkholes, Geotechnical Georgia, Geotechnical Alabama, Geotechnical Florida, Geotechnical Mississippi, CPT Blog|

Source: UNF first in Florida to conduct large-scale l | EurekAlert! Jacksonville, Fla. – University of North Florida researchers will be the first in Florida to conduct large-scale laboratory testing of sinkhole mechanics. Dr. Ryan Shamet, civil engineering assistant professor, was recently awarded a Florida Department of Transportation project grant for “Validation and Update of the Sinkhole Index,” a project that will aim to better understand the potential of sinkhole formation prior to any collapse at the surface. This joint project between UNF and University of Central Florida includes $90,259 for UNF and new equipment coming to UNF labs. The new equipment consists of a large-scale soil box that will allow UNF researchers to recreate and monitor the geotechnical and hydraulic mechanics of sinkholes forming in north and central Florida. The researchers at UNF and UCF will collect data from active sinkhole sites throughout the state and then refine and update analysis techniques for varying geologic conditions or regions based on their data. This analysis technique will allow engineers to quantify a location’s relative vulnerability of conditions favorable to sinkhole collapse when raveling conditions are encountered using an investigation test called the Cone Penetration Test (CPT). CPTs are a common subsurface investigation tool used by geotechnical engineers to identify soil layers and measure the strength of the soil within a project location. Through quantifying the raveling phenomenon, local engineers can better discern which mitigation techniques, such as compaction grouting or road closure, should be performed to lower the associated risk of sinkhole collapse.

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Soil Nail Walls Design and Construction

By kk42|September 23rd, 2021|Geotechnical Arizona, Geotechnical Michigan, Geotechnical Arkansas, Geotechnical Missouri, Geotechnical California, Geotechnical Maryland, Geotechnical Louisiana, Geotechnical Connecticut, Geotechnical Nevada, Geotechnical Florida, Geotechnical New Jersey, Geotechnical Kansas, Geotechnical Rhode Island, Geotechnical North Carolina, Geotechnical South Dakota, Geotechnical West Virginia, Geotechnical Texas, Geotechnical Ohio, Geotechnical USA, Conferences, Geotechnical Illinois, Geotechnical US, Geotechnical Alaska|

Source: Soil Nail Walls - Design and Construction -NEW (7003IW2022) INSTRUCTOR: Naresh Samtani, Ph.D., P.E., D.GE, F.ASCE Participants will have access to the virtual workshop video archives and materials for 60 days from the start day of the workshop. Virtual Workshop Brief Using a collaborative and interactive learning approach, this virtual workshop will help you understand the design and construction aspects for soil nail walls. You will learn newer design approaches based on the LRFD platform that is the basis for guidelines for soil nail walls by the American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA). The workshop will help you assimilate the design and construction aspects through active participation by frequent interactions throughout the workshop and real-time expert feedback. The interactions will facilitate a better understanding of the nuances of the newer design principles which would help you avoid costly design errors in real-world projects. In between the two live sessions, attendees will independently work on an application (e.g., exercises) or a reflection (e.g., reading) assignment. Learning Outcomes Upon completion of this course, you will be able to: Explain the terminology for soil nail walls Explain design of soil nail walls using principles of limit state design Explain the essential elements of construction Recognize construction procedures and influence on wall design and performance Explain the importance and concepts of nail testing Identify necessary characteristics of software tools Explain corrosion considerations Discuss facing (shotcrete) analysis Identify the necessary information on plans and specifications Benefits for Participants Become familiar with the latest limit state design approaches and standards for soil nail walls Avoid common pitfalls and costly errors in analysis and design Be able to categorize and streamline limit state evaluation Recognize the importance of considering construction as part of overall design process Assessment of [...]

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